Bests & Worsts Reviews from Amazon

I read other reviews noting how light the paper used for these folders is, compared to what most of us think of typical file folders. Foolishly, I dismissed those reviews -- all seemed inexact, and too subjective. I shouldn't have. These folders really ARE thinner than normal, insufficiently robust to be used for anything but the lightest filing needs. Very often, I need to add a two-hole punch to the tops of the folders I'm using, then add a two-prong clip. That's just not practical with these folders; such heavy use would tear them to pieces quickly. A huge problem here is the absolute absence of information provided by the manufacturer and/or seller. Card stock is typically reported by "points" or "mils." This is the thickness of a sheet in thousandths of an inch. Such info would be enormously useful for consumers trying to decide which products to purchase blind. A typical business card is about 9.5 pt., while a grocery sack is around 7.6 pt. These folders are pretty close to the lightest business cards I've collected in recent months, so around 9 pts. I'll bet a better (more "standard") file folder would be around 10-11 points. (Or alternately, by paper weight: card stock ranges from 50 to 110 pounds). Why doesn't Amazon or the seller provide this kind of information? Without it, you ARE buying blind. With it, you could more intelligently balance out cost v. need. Anyhow, only two stars because these are NOT truly "standard" filer folders. They are perfectly usable for light long-term filing, but not for adding 2-prong clips or frequent reference use.